165168738 has 48 divisors (see below), whose sum is σ = 409718400. Its totient is φ = 47107008.

The previous prime is 165168733. The next prime is 165168739. The reversal of 165168738 is 837861561.

165168738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165168693 and 165168702.

It is not an unprimeable number, because it can be changed into a prime (165168733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117363 + ... + 118761.

It is an arithmetic number, because the mean of its divisors is an integer number (8535800).

Almost surely, 2^165168738 is an apocalyptic number.

165168738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

165168738 is an abundant number, since it is smaller than the sum of its proper divisors (244549662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165168738 is a wasteful number, since it uses less digits than its factorization.

165168738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2348 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 165168738 is about 12851.7990180363. The cubic root of 165168738 is about 548.6675602897.

The spelling of 165168738 in words is "one hundred sixty-five million, one hundred sixty-eight thousand, seven hundred thirty-eight".